What is it about?
Electricity and natural gas networks are critical infrastructure for society, but the robustness of coupled networks has not been evaluated even though both systems have strong interactions. Our results show that the investment program proposed by both network operators ultimately improves the robustness of the interdependent electricity and natural gas infrastructure compared to the current system.
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Why is it important?
We propose a novel graph theory-based methodology to assess the structural robustness of the coupled natural gas and electricity transmission networks in Spain while considering their interdependencies. Cascading failures were simulated in 22 case studies with different topologies, and the performance against random failures was evaluated. Our results demonstrate that the construction of some assets for the expansion of the gas and electricity networks does not improve the structural robustness of the coupled network; however, an improvement occurs when the entire investment program is considered.
Perspectives
The conclusions of this study are relevant to the analysis of the robustness of interdependent gas and electricity infrastructure against cascading failures, supporting the transmission network planning not only under classical concepts of reliability and adequacy but also considering system robustness and resilience.
Jose M Yusta
Universidad de Zaragoza
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This page is a summary of: Robustness Assessment of the Expansion of Coupled Electric Power and Natural Gas Networks Under Cascading Failures , IET Generation Transmission & Distribution, October 2018, the Institution of Engineering and Technology (the IET),
DOI: 10.1049/iet-gtd.2018.5799.
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